Bump io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha (SolaceProducts#419)

Bumps [io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha](https://github.com/open-telemetry/opentelemetry-java-instrumentation) from 2.19.0-alpha to 2.20.1-alpha.
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

---
updated-dependencies:
- dependency-name: io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
  dependency-version: 2.20.1-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

solace-spring-cloud-stream-binder-opentelemetry/solace-spring-cloud-stream-binder-instrumentation/pom.xml

@@ -22,7 +22,7 @@
 
   <properties>
     <opentelemetry.version>1.48.0</opentelemetry.version>
-    <opentelemetry-javaagent-extension.version>2.19.0-alpha</opentelemetry-javaagent-extension.version>
+    <opentelemetry-javaagent-extension.version>2.20.1-alpha</opentelemetry-javaagent-extension.version>
     <auto-service.version>1.0.1</auto-service.version>
   </properties>